A Lumberton Township woman has been arrested and charged with rolling onto and suffocating her 1-year-old child after she overdosed on drugs, police said Sunday.

The 13-month-old boy’s grandmother called 911 at about 8:40 p.m. Saturday, police said.

Once at the home, emergency responders found both the mother and the child unresponsive in the mother’s bed. Authorities have identified the mother as 33-year-old Antoinette King

Lumberton police said they were able to use Narcan to revive King, but first responders performing CPR on the boy could not revive him.

Authorities said it appeared King had rolled over onto the boy and suffocated him. He was pronounced dead at a nearby hospital. The mother has been charged with endangering the welfare of child and is currently being held in Burlington County Jail.

The Burlington County Prosecutor’s Office and Lumberton police are continuing the investigation.